Slug clamp for multigraph machine drums



Feb. 14, 1939. K. FYLER SLUG CLAMP FOR MULTIGRAPH MACHINE DRUMS Filed Aug. 4, 1937 INVENTOR m 9 4/ ?ATTOR2EY5 Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE Lane K. Fylcr, Pittsfield, Mass, assignor to Eaton Paper Corporation, Pittsfield, Mass, ration of Massachusetts Application August 4,

10 Claims.

My present invention relates to a type or slug holder for Multigraph or other cylinder printing machine drums, and aims to provide certain improvements therein.

The objects of my invention are as follows: to provide a holder of the class set forth which will permit rapid changes in type or slug set-ups; one wherein such changes can be made without the aid of tools; one wherein the type or slugs will be clamped under equalized pressure; one wherein the use of metal wedges for tightening the type or slugs is eliminated; one wherein the clamping operating means are wholly within the periphery of the drum when in clamping position and will not introduce any hazard to either the operator or the machine by the revolving drum; and one which can be used equally well for holding Linotype or Intertype slugs, small signature plates, etc.

The foregoing and other objects not specifically enumerated I accomplish by providing in a Multigraph or other cylinder printing drum an arcuate drum section having a type or slug receiving recess therein, within which is mounted a movable clamping member having means for normally holding said member in unclamping position and means confinable wholly within the periphery of the drum section for moving and holding the clamping member in clamping position. Preferably the clamping operating means consist of a plurality of finger-operable, pivoted cam-levers mounted in the drum section and accessible from the periphery thereof and of a form to lie substantially flush with the periphery of the drum section when the levers are in clamping or slug-holding position. The invention will be better understood from the detailed description which follows when considered in conjunction with the accompanying drawing, wherein I have shown a preferred embodiment and in which- Figure 1 is a top plan View of a portion of a Multigraph machine printing drum having my invention embodied therein.

Figs. 2, 3 and 4 are sections taken along the planes of the lines 2--2, 33 and 4-4, respectively, of Fig. 1.

Fig. 5 is a section corresponding with Fig. 4, showing the clamping member in unclamping position.

Referring to the drawing, let the reference numeral indicate a peripheral frame section of a cylinder printing drum, said frame comprising a peripheral bed portion I I having transverse end members 12 and arcuate side members a. corpo- 1937, Serial No. 157,346

l3 and I4. The bed portion II is formed with a central recess having radial end walls l2a, and mounted within said recess and adapted to be supplementally held therein by clamping bolts IS in an arcuate drum section l6 having adjacent a longitudinal edge I! thereof a type or slug receiving recess I8. The peripheral frame section may be secured to the cylinder printing drum I811 in any desired manner.

Movably mounted within the recess I8 is a movable clamping bar or member IS. The arcuate drum section I is formed intermediate its arcuate ends with a pair of spaced, substantially tangentially-extending recesses 20, which extend inwardly from the periphery of the drum and terminate short or inwardly of a wall 2| of the recess 18 and are then continued in diminished diameter through said wall to provide shoulders 22. Mounted in each of said recesses 20 and extending through the bore of smaller diameter in the wall 2! is a screw 23, the inner end of which screw-threadedly engages within a threaded opening in the clamping member is. Encircling each screw 23 is a spring 23a, one end of which bears against the head of the screw and the other end of which bears against the shoulder 22 and operates to normally urge the clamping member into unclamping position, or, in other words, against the wall 2|.

In transverse, laterally-spaced relation to the recesses 20, the periphery of the arcuate drum section I 6 has formed therein peripherally extending slots 24, the inner ends of which open into cylindrical sockets 25 which extend through the wall 2|, and the outer ends of which intersect recesses or depressions 26, the function of which will presently appear. Mounted within each of the slots 24 is a cam-lever 2'! having opposite flat sides, a straight inner edge 28, a curved outer edge 29, and a curved inner end wall 30. The lever 21 is pivotally mounted about a pin 3|, herein shown as a screw extending inwardly from the end of the drum section and passing through the lever 21, the said lever being eccentrically mounted with respect to the curved end wall so that the perpendicular distance from the pivot to the top edge 29 is less than the perpendicular distance to the lowermost point of the curved end wall 30. This eccentric mounting of the lever renders the curved end wall 3|! a cam surface the function for which will presently appear. Mounted within each of the cylindrical sockets 25 is a cushioned follower member 32 consisting of a disk 33 having an axial socket therein and a rivet-like member 34, the hub of which engages within the socket in the disk 33, and a coilspring 35 mounted between the disk 33 and the head of the rivet-like member 34 normally urging said elements apart. The distance between the clamping member I 5 and the end of the lever 21, however, is at all times less than the full length of the follower, which is accordingly constrained to remain under spring tension. Moreover, the tension of the springs 35 is less than that of the springs 23a, so that when the levers 21 are in unclamping position as shown in Fig. 5, the cushioned follower will be moved upwardly, as viewed in Fig. 5, by the movement of the clamping member under the tension of the springs 23a. The extent of this movement is substantially equal to the throw of the cam surface 30, so that the cushioned follower 32 will move substantially through the same distance as the throw of the cam and thus operate to maintam a cushioned or balanced clamping pressure upon the clamping member l9.

Within the recess it; are a plurality of slugs 36 separated by suitable spacing strips 31, said slugs being adapted to be held in operative position within said recess by the clamping levers 21. In this connection it will be understood that when the levers 27 are in the position shown in Fig. 5, the recess in the arcuate drum section may be said to be open to receive the slugs which are then inserted to substantially fill the recess, whereupon, by moving the cam-levers into the position shown in Fig. 4 so as to bring the cams into effective operating and clamping position, the followers 32 will be moved inwardly and exert a cushioned pressure upon the clamping member I9 to hold the slugs within the recess. Preferably the slugs, the side walls of which are substantially parallel, are so mounted within the recess that the center slug extends in a plane substantially radial to the drum and the pressure applied to said slugs by the clamping memher is substantially perpendicular to the side walls of the slugs; accordingly, the follower members 32 are mounted in substantially perpendicular relation with respect to the clamping member l9.

The arcuate drum section may be suitably secured within the peripheral frame section 10 by means of screws or equivalent fastening devices 38, which extend radially through the arcuate drum section I6 and engage in the base of the bed portion H.

In the use of my present invention the arcuate drum section IS with its clamping member and means for operating said member is first mounted within the peripheral frame section 10 through the medium of the clamping screws 38 and the supplemental clamping bolts 15. Normally there are no slugs or type-bars in the recess within the arcuate drum section, and hence the clamp-- ing member I5 is normally held in the position shown in Fig. 5 by the tension of springs 23a. When it is desired to mount slugs therein, the slugs and spacers are suitably positioned in the recess and the operating levers 29 moved inwardly into the recesses 24 to earn the followers to move the clamping member into slug-clamping relation. When thus held it will be apparent that the curved outer edges of the clamping levers lie substantially flush with the peripheral surface of the drum section l6, and that all the clamping means are wholly within said peripheral surface; moreover, that in the rotation of the machine during the printing operation, movement of the drum will be in the direction of the arrow (Fig. 4) so that such rotation will cooperate to hold the clamping levers in slug-clamping position wholly within the periphery of the drum and thus eliminate the hazard of damage to the machine or to the operator.

When it is desired to make a change in the type set-up, or to substitute slugs for those in the machine, it is merely necessary to flip the levers 2? outwardly by engaging the pointed ends 39 thereof by the fingers, which action is readily facilitated by provision of the recess 26 into which the pointed ends 39 of the levers seat. The levers when thus moved into unclamping relation permit ready withdrawal of the slugs, and replacement thereof by others, whereupon, by again moving the levers inwardly, a new set-up is ready for the printing operation. It will thus be seen that rapid changes in type and slug set-ups can be readily accomplished merely through the use of the operators fingers and without the aid of tools of any kind or of supplemental wedges, shims or the like.

The device illustrated is primarily intended for clamping slugs or their equivalent, which have a length extending completely across the width of the recess I8. It will be apparent, however, that where the slugs are of shorter length, or where it is desired to include in a drum two or more sets of slugs in end-to-end relation, the clamping member l9 may be made in two or more sections each provided with a pair of camclamping levers, so that any set of slugs may be independently changed as desired.

It will be accordingly appreciated that although I have shown and described a preferred embodiment of my invention and the manner in which the same is constructed and intended for use, I do not wish to be limited to the details of construction disclosed, since it will be apparent that changes therein may be made within the range of engineering skill without departing from the spirit of the invention as defined in the following claims.

What I claim is:-

l. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a type or slug receiving recess therein, a movable clamping member in said recess, means normally urging said clamping member into unclamping position, and a pivoted lever confinable wholly within the periphery of the drum section for moving and holding the clamping member in clamping position within the recess.

2. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a type or slug receiving recess therein, a movable clamping member in said recess, means normally urging said clamping member into unclamping position, and a finger-operable pivoted lever confinable wholly within the periphery of the drum section for moving and holding the clamping member in clamping position within the recess.

3. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a type or slug receiving radial recess therein, a movable clamping member in said recess having a substantially radially extending clamping wall, means limiting the movement of said clamping member so that its clamping wall will always extend substantially radially while normally urging said clamping member into unclamping position, and means confinable wholly within the periphery of the drum section for moving and holding the clamping member in clamping position within the recess.

4. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a type or slug receiving recess therein, a movable clamping member in said recess, spring means normally urging said clamping member into unclamping position, and a pivoted lever having a cam surface confinable wholly within the periphery of the drum section for moving and holding the clamp-ing member in clamping position within the recess.

5. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein extending longitudinally of the drum, a movable radially extending clamping member in said recess, means normally urging said clamping member into unclamping position, and fingeroperable means confinable wholly Within the periphery of the arcuate drum section for moving and holding the clamping member in clamping position within the recess.

6. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein, a movable radially extending clamping bar in said recess, resilient means wholly within the periphery of the drum section normally urging said clamping bar into unclamping position, and means wholly confinable within the periphery of the drum section for moving and holding the clamping bar in clamping position within the recess, said last-mentioned means comprising a cam-lever pivotally mounted within a recess in said drum section and a cushioned follower cooperating with the cam-lever.

'7. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein, a movable radially extending clamping bar in said recess, resilient means wholly within the periphery of the drum section normally urging said clamping bar into unclamping position, and means for moving and holding the clamping bar in clamping position within the recess, said last-mentioned means comprising a cam-lever pivotally mounted within a recess in said drum section which extends to the periphery thereof, the said lever when in clamping position lying wholly within the recess.

8. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein, a movable radially extending clamping bar in said recess, resilient means wholly within the periphery of the drum section normally urging said clamping bar into unclamping position, and means wholly confinable within the periphery of the drum section for moving and holding the clamping bar in clamping position within the recess, said last-mentioned means comprising a cam-lever pivotally mounted Within a substantially tangential recess in said drum section, the said lever having a curved outer surface which lies substantially flush with the periphery of the drum when the lever is in clamping position.

9. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein extending longitudinally of the drum, a movable clamping member in said recess, means normally urging said clamping member into unclamping position, and means confinable wholly within the contour of the drum section for applying clamping pressure substantially perpendicular to the radial plane of the clamping member for holding the latter in clamping position.

10. A type or slug holder for use in a cylinder printing drum comprising an arcuate drum section having a radial type or slug receiving recess therein, a movable radially extending clamping bar in said recess, resilient means wholly within the periphery of the drum section normally urging said clamping bar into unclamping position, and means for moving and holding the clamping bar in clamping position within the recess, said last-mentioned means comprising a cam-lever pivotally mounted within a recess in said drum section which extends to the periphery thereof, the pivotal mounting of the lever being such that rotation of the drum will operate to hold said lever in slug-clamping position within the drum section.

LANE K. FYLER. 

